智能配电网无线传感器网络数据通信的QoS-MAC层模型

QoS-MAC Model of Wireless Sensor Networks for Smart Distribution Power Grid Data Communication

根据中国电力工业通信规范对配电网通信数据的要求,研究了一种在IEEE 802.15.4标准媒体访问控制(MAC)层协议中引入服务质量(QoS)支持的信道访问机制QoS-MAC模型。通过将配电网遥信、遥控、遥测三类通信数据分为3种优先等级的传输数据,建立节点内三级数据缓冲队列状态的马尔可夫链模型。依据该模型建立了每个节点的信道访问冲突模型、不同优先级数据网络有效吞吐率模型、传输延时模型、节点的无线信道冲撞率模型。通过仿真实验研究,衡量配电网无线传感器网络数据通信的性能。在不同的配电网数据产生率的情况下仿真实验结果表明,所提出的方法可为基于无线传感器网络的配电网数据通信提供有效的QoS保障。

According to the requirements of power industry specifications on communication data of the distribution power grid(DPG),an enhanced quality of service(QoS)-media access control(MAC)model with channel access mechanism based on IEEE 802.15.4 protocol is researched.By dividing the three communication data of telesignalisation,telecontrol and telemetering in DPG into three priority levels of transmit data,a Markovian chain model of node buffers is built.According to the model,every nodes channel access conflict model,different priority levels of network data throughput models,the communication time-delay model and wireless channel collision model are developed.A simulation analysis is designed to analyze the wireless sensor networks(WSNs)data communication performance of the DPG.The simulation results in different distribution data rate scenarios show that the method proposed is able to provide effective QoS for DPG data communication based on WSNs.